IP Library › Granted Patent US 12,220,898
Granted Patent B2
US 12,220,898 · App. 17/266,277 · Granted Feb 11, 2025

Thermoplastic roofing membranes adapted for adhesion to polar adhesives

Inventors: Hao Wang (Carmel, IN); Donna C. Tippmann (Fishers, IN)
Assignee: Holcim Technology Ltd
B32B27/20B29C48/001B29C48/0021B29C48/022B29C48/08B29C48/9135B32B7/12B32B27/12B32B27/32B32B37/153B32B37/203B32B37/206B32B38/0012C08K3/26C09J175/04E04D5/10E04D5/148B29K2023/06B29K2023/08B29K2023/10B29K2023/14B29K2101/12B29K2509/00B29K2509/02B29L2031/108B32B2038/0016B32B2250/03B32B2250/40B32B2264/104B32B2419/06C08K2003/265
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Quick Facts
Patent No.
US 12,220,898
App. No.
17/266,277
Granted
Feb 11, 2025
Kind
B2
Abstract

A method of preparing a thermoplastic roofing membrane, the method comprising (i) extruding a composition including a thermoplastic polymer and a mineral filler to form an extrudate; (ii) forming the extrudate into a sheet having first and second planar surfaces; (iii) allowing the sheet to at least partially cool; and (iv) mechanically treating the first planar surface of the sheet to thereby expose the mineral filler.

Claims (18)

1. A method of preparing a thermoplastic roofing membrane, the method comprising:

(i) extruding a first composition including a thermoplastic polymer and a first mineral filler to form a first extrudate;

(ii) extruding a second composition including a second thermoplastic polymer and a second mineral filler to form a second extrudate;

(iii) forming the first and second extrudates into first and second sheets, each having first and second planar surfaces;

(iv) positioning a reinforcing fabric between the first and second sheets;

(v) laminating the first sheet to the second sheet to thereby sandwich the reinforcing fabric between the sheets to thereby form a laminate sheet, where the second planar surface of the first sheet and the first planar surface of the second sheet contact the reinforcing fabric;

(vi) allowing the laminate sheet to at least partially cool; and

(vii) mechanically treating the first planar surface of the first sheet to thereby expose the first mineral filler.

2. The method of claim 1 , where said step of mechanically treating includes abrading, sanding, or shaving the first planar surface of the first sheet.

3. The method of claim 1 , where said step of mechanically treating includes subjecting the first planar surface of the first sheet to a sanding, abrading, or shaving element.

4. The method of claim 1 , where said step of mechanically treating includes subjecting the first planar surface of the first sheet to an abrading element, and where said abrading element includes a file or knurled surface.

5. The method of claim 1 , where the first and second thermoplastic polymers are an olefinic polymer.

6. The method of claim 1 , where the first and second thermoplastic polymers are selected from the group consisting of thermoplastic olefinic polymers (TPOs), polyolefin blends, propylene-based elastomers, ethylene-based olefinic block copolymers, and/or functionalized polyolefin resins.

7. The method of claim 1 , where the first mineral filler is calcium carbonate.

8. The method of claim 1 , where said step of allowing the laminate sheet to cool allows the sheet to cool below 100° C.

9. The method of claim 1 , where the first planar surface of the first sheet is a substrate-contacting planar surface of the thermoplastic roofing membrane adapted to be adhered to a roof substrate, and where the second planar surface of the second sheet is a top planar surface adapted to be exposed to conditions exterior to the roof substrate.

10. The method of claim 7 , where the second mineral filler is selected from the group consisting of clays, silicates, titanium dioxide, talc, mica, alumina trihydrate, antimony trioxide, titanium dioxide, silica, magnesium hydroxide, calcium borate ore, and mixtures thereof.

11. The method of claim 1 , where greater than 80% of a surface area of the first planar surface of the first layer is treated to thereby expose the exposed mineral filler.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 2, 2025
From: HOLCIM TECHNOLOGY LTD
To: AMRIZE TECHNOLOGY SWITZERLAND LLC
Reel/Frame 072795/0105 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 19, 2022
From: FIRESTONE BUILDING PRODUCTS COMPANY, LLC
To: HOLCIM TECHNOLOGY LTD
Reel/Frame 061141/0683 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 5, 2021
From: WANG, HAO; TIPPMANN, DONNA C.
To: FIRESTONE BUILDING PRODUCTS COMPANY, LLC
Reel/Frame 055162/0770 →
Continuity (2)
Provisional Application 62716043 · Aug 8, 2018
Related Publication 20210300007A1 · Sep 30, 2021
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